高二英语Unit 13—The Water Planet（I）人教版知识精讲VIP专享VIP免费

高二英语Unit13—TheWaterPlanet（I）人教版【本讲教育信息】一.教学内容：Unit13—TheWaterPlanet（I）二.重点词汇讲解：难点句解析三.知识总结归纳：单元内容介绍：主题：水的星球。涉及：水的化学结构，物理性质，水的用途，入海口，海洋等。阅读材料：ThePropertiesofWater：水的特性。介绍了水的化学结构及性能，海水的含盐量，密度，热容量以及海水的运动。Nature’sNursery：estuaries：介绍了河流的入海口有着丰富的生态资源，对动植物有着重要作用。语法复习：复习情态动词的用法。四.重要词汇讲解：1.benefit：使……受益；利益；常用的短语：benefitfrom：从……受益Whobenefitsfromusingwaterinthisway?HisEnglishbenefitedfromhislongassociationwithBritishchildren..AtomscienceisbeingdevelopedinChinatobenefitthepeopleratherthanharmthem.China’seconomicreformsaretothebenefitofthewholenation.2.range：在一定范围内变化。固定短语：rangefrom….to…：从……到……不等Lifeintheoceansrangesfromthetiniestplanktonallthewayuptogiantslikesharksandwhales.Pricesrangedfrom5dollarsto10dollars.Theiragesrangefrom12to25.range还有“射程；可达到的距离或范围”的意思。Thegoalisoutofrange.3.relative：相对的；比较而言thepositionofthesunrelativetotheearthGiventhefailureofthepreviousplan,thisturnedouttobearelativesuccess.Lackofexerciseisalsoariskfactorforheartdiseasebutit’srelativelysmallwhencomparedwiththeothers.4.absorb：吸收:absorbedinsth.：被……吸引；全神贯注于……Watercanabsorbandgiveoffalotofheatwithoutbigchanges.Sheseemedtotallyabsorbedinherbook.5.freezing：冰冻的，极冷的；冰点：freezingpoint;I’mfreezing.用心爱心专心frozen：冷冻的，冷藏的；冻僵；结冰的：Thegroundwasfrozensolid.6.sensitive：敏感的，灵敏的sensible：明智的；通情达理的：Mostofanimalsandplantsaresensitivetolargeorsuddenchangesintemperature,sotheoceanissafeandcomfortablehabitat.Usually,Iamsensiblewithmoney,asIhavetobe,giventhatIdon’tearnthatmuch.7.callin：召集，打电话callon：拜访，某人callat：拜访某地callup：使某人想起……8.giveoff：释放；放出（液体，气体，烟雾）Hefoundthaturaniumcouldgiveoffcertainrays.giveout：发出（声音，光，电，热，信号）；用尽；分发Thebirdgaveoutapleasantsound.Thewaterwillgiveout.giveaway：馈赠；giveup：停止；放弃；givein：屈服从构词角度理解并适当扩展下列单词：mariner;transport;unique;relative;freezing;decrease;reproduce;pollutant五.难点句解析：1.Waterisactuallyquitesimple,butthewaythewatermoleculeisformedgiveswateritsuniqueproperties.水实际上很简单，但是水分子形成的方式赋予了水的独特性能。thewatermoleculeisformed是定语从句修饰theway,在这里省略了关系词。theway作为先行词后面的定语从句的引导词有that;inwhich;或省略关系代词。Idon’tunderstandtheway（that/inwhich）heworkedouttheproblem.2.Thenutrientsinwhateverfallsintotheoceanquicklybecomeavailabletootherlivingcreatures.任何落入海洋的物质中的营养物都会很快被其他生物所吸收利用的。whateverfallsintotheocean作为宾语从句做介词in的宾语。Whatever引导名词性从句，表示：任何……东西。Youcaneatwhateveryoulike.Whateverisleftisyours.available：可用的，可以得到的．Chinesecommoditiesavailableforexportarevaried.I’msorry,thoseovercoatsarenotavailableinyoursize.Attention,please.Theseticketsareavailableonthedayofissueonly.3.Ifasubstancehasahigherdensity,say5,000kg/m3,itwillnotfloatonwater.假如一个物质密度更大，比方说每立方米5,000千克，那它就不会浮在水面上。say：设想，假定，比如说。Let’ssaythatyouareright.用心爱心专心Sayyouareaway,whowouldlookafteryourmother?Let’stakeanywriter,sayDickens…4.Heatcapacityistheamountofe...